sciencehabit writes: Mice genetically engineered to produce high levels of a protein that helps cells segregate their chromosomes are less prone to cancer, according to a new study. The animals also developed fatal cancers much later than normal mice, and they lived 15% longer than controls. What's more, the rodents looked veritably Olympian on a treadmill, running about twice as far—200 meters rather than 100 meters—as control animals